# React-aria MCP (@react-aria/mcp) - AgentBreakWatch Reference

> TL;DR Verdict: React-aria MCP (`@react-aria/mcp`) is currently at v1.2.1 on NPM (published 2026-09-01), with a 90-day Stability Score of 78/100 (B) and MEDIUM schema drift risk across 29 releases in the last 90 days. Built on MCP SDK (^1.17.3); recent release v1.2.1 (up from v3.0.0-nightly-99e610236-261006) updates Developer Tools MCP tool schemas and transport handling (29 releases in last 90d). Pin exact version v1.2.1 in .mcp.json to avoid silent parameter drift.

## Live Telemetry Metadata
- Canonical Page: https://agentbreakwatch.vercel.app/p/react-aria-mcp
- Category Hub: https://agentbreakwatch.vercel.app/c/mcp-bridges-devtools (MCP Bridges, Transports, Inspectors & Developer Tools)
- Package Name: `@react-aria/mcp`
- Registry: NPM (https://www.npmjs.com/package/@react-aria/mcp)
- GitHub Repository: https://github.com/adobe/react-spectrum
- Vendor: React Aria
- Latest Live Version: v1.2.1
- Published Date: 2026-09-01T14:25:38.344Z
- 90-Day Release Count: 29
- Direct Dependencies: 3
- License: Apache-2.0
- Stability Score: 78/100 (Grade B)
- Schema Drift Risk: MEDIUM
- Recommended Exact Pin Command: `npx -y @react-aria/mcp@1.2.1`
- Watched Symbols / MCP Tools: mcp, tools/list, tools/call
- Snapshot Timestamp: 2026-10-24T12:11:27.697Z

## Breaking Change & Schema Drift Summary
Built on MCP SDK (^1.17.3); recent release v1.2.1 (up from v3.0.0-nightly-99e610236-261006) updates Developer Tools MCP tool schemas and transport handling (29 releases in last 90d). Pin exact version v1.2.1 in .mcp.json to avoid silent parameter drift.

## Migration Diff: Before (Deprecated / Unpinned Pattern)
```
"react-aria-mcp": {
  "command": "npx",
  "args": ["-y", "@react-aria/mcp@latest"]
}
```

## Migration Diff: After (Verified v1.2.1 Pattern)
```
"react-aria-mcp": {
  "command": "npx",
  "args": ["-y", "@react-aria/mcp@1.2.1"]
}
```

## Recent Verified Releases
- v3.0.0-nightly-2691598d3-261008 (published 2026-10-08) [LATEST]
- v3.0.0-nightly-99e610236-261006 (published 2026-10-06)
- v3.0.0-nightly-99e610236-261005 (published 2026-10-05)
- v3.0.0-nightly-99e610236-261004 (published 2026-10-04)
- v3.0.0-nightly-99e610236-261003 (published 2026-10-03)
- v3.0.0-nightly-17334738e-260929 (published 2026-09-29)